What an irony. None of the Ponzi scams in Investment Based Games section has named themselves as Ponzi and you, being not a Ponzi (in fact a roulette style game), named yourself a Ponzi !!! 
I don't see how his game is anything like roulette really. It's like a modified Ponzi. Whether you 'win' or not depends entirely on people playing after you to fund your payout. The modification (your 'bet' has a fixed number of hours to be paid out, otherwise it gets deleted) seems relatively minor - fundamentally it's still a Ponzi game.
